diff --git a/README.md b/README.md
index b14921b..0a3ca7c 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,8 @@
 
 # ⚗️Mercury
 
-Mercury is a collection of UDFs for Hive.
+Mercury is a collection of UDFs for Hive. 
+There are two types of Hive UDFs: simple and generic. While simple UDFs are easier to construct, they are less flexible and generally less efficient.
 
 | Category   | Description                                 |
 |------------|---------------------------------------------|
@@ -22,4 +23,4 @@ Mercury is a collection of UDFs for Hive.
 │ ├── JaccardSimilarity  
 │ └── ...   
 └── ...  
-```
\ No newline at end of file
+```